Strap cutting means for venetian blinds



Sept. 5, 1950 J. J. FINE STRAP CUTTING MEANS FOR VENETIAN BLINDS Filed Nov. '10, 1947 FIG.II

FIG. 3

YINVENTOR. JOSEPH J. FINE HIS ATTORNEY Patented Sept. 5, i950 STRAP CUTTING MEANSJFORVVENETIAN BLINDS a "Josepgh JLEine, Brookli ne, Mas:s. v V Application November 10, 1947, Serial No. rs'asssg 4 Claims. (01. 164-41) The present invention relates to a device for cutting Venetian blind tapes and is an improvement over my co-pending application Serial No. 748,791, filed May 1'7, 1947. The improvement in the present invention chiefly concerns the cutting mechanism, but in association with the measuring means whereby the correct tape length for a desired group of blinds may be measured. In the manufacture of Venetian blinds, it is common to make the blinds of a certain pre-determined length and this fixes the length of the tape which is used in the blinds. Two or three tapes, or even more, are used for a single blind, the tape, as is well known, running lengthwise of the completed blind. If the tapes are out too long, material is, of course, wasted and they must also be recut, while if they are cut short they must be discarded for the blind for which they were originally intended. The cutting, therefore, is an important feature in the manufacture of the blind and accurate and rapid cutting aids materially in manufacture.

The present invention will be more fully described. in the specification below, illustrating an embodiment thereof, when taken in connection with the drawings, in which:

Fig. 1 shows the invention partly in cross section;

Fig. 2 shows a section taken substantially on the line 22 of Fig. 1; and

Fig. 3 shows a detail of the attachment of the tape to the cutting means.

In the present invention, as in my previous application, the same type of bench I may be used with other similar elements such as the rail 2, the spacer 4, the attaching screw and the carriage 1, with the C-shaped supporting section 8 which encloses and slips along the rail '2, the clamping wing nut 9 and the set screw l3 for locking the post l2 in the cylindrical collar l I. These elements are more fully described in my co-pending application.

In the present invention, the post I2 is provided with an inwardly extending plate [4 and an angularly forwardly and upwardly extending finger IS, the upwardly extending finger l5 having an inner edge I 6 which serves as one of the shearing edges in the mechanism. Directly in front of the plate I4 is pivoted a second plate I! with a downwardly and inwardly extending finger l8. Both I1 and I8 extend backwards or to the right as viewed in Fig. 1, and have a downwardly projecting end I!) on which a handle 20 is attached. The upper edge 2| of the plate I! is formed as the second shearing edge, cooperating with the edge It to cut the tape member at the top while the lower finger It, at its edge 23, cooperates with the lower edge 22 of the plate M to shear the lower end of the tape. The plates [4 and I! are pivoted together at 24. Each finger member, l5 and I8, may be provided with supporting guides 25 and 26, comprising angle brackets which extend outward to the external surfaces of the plates l1 and M respectively.

As the handle 20 is brought downward as viewed in Fig. 1, the plate I! and the arm l8 are rotated in clockwise rotation as seen in Fig. 1, while the plate l4 and the arm 15 remain in a stationary position. The cutting edge 23 on the arm I8, and 22 on the arm l4, shear across one another to cut the lower tape 43 just to the left of the corner 44, where the cross piece emerges from the tape 43, while the cutting edge 2| of the arm l1, and I6 of the arm l5, shear the upper tape 42. The inner surfaces of the guide angle members 25 and 26 move in a sliding contact across the outer surfaces of plates l1 and I4 respectively as the shearing blades come together.

In the present construction, the blades are made comparatively thin and as a result the shearing lengths of the tapes at either side are practically for all purposes the same. The simplicity of the shearing arrangement, in which the handle action produces the motion of the cutting blades directly without any intricate mechanism such as cams, gears, or the like, makes it possible to provide an accurate cutting mechanism in a comparatively simple manner.

Having now described my invention, I claim:

1. In a tape cutter for cutting a pair of separate strips for Venetian blinds, a shearing means therefor comprisin a pair of shearing plates pivoted in face to face relation, each having two cutting edges adapted to engage in pairs, said pairs of edges being positioned at the sides of the plates recessed therein, and bracket members extending from the sides of said plates with an inner surface positioned to engage the outer surface of its opposed plates as the plates are turned about their pivots.

2. A tape cutter for cutting a pair of separate strips for Venetian blinds, comprising a pair of shearing members, one member having an operating handle and the other member a supporting arm for supporting the cutter, means pivoting said members together for shearing action, each of said members having a cutting plate with parallel sides and an adjacent cutting blade in the same plane as the plate, the cutting blades being on opposite'sides of the cutting plates with the plates in opposing relation to each other.

3. A tape cutter for cutting a pair of separate cutting blade inthe sameiplanezas,the-plate, said cutting platesbeing awvidth corresponding to-thespacing between said strips, the cutting blades being on opposite sides of the cutting plateswith the plates in opposing relation to each other.

4. A tape cutter for cutting a pair of separate strips for Venetian blinds, comprising arpainof.

shearing members, one member having an operating handle and the othermemberasupport ing arm for supporting the cutter, each: of said members having a cutting plate with parallel sides and an adjacent ,vcutting blade inithe same 20 4 plane as the plate, means pivoting said members together through the cutting plates, the cutting blades being on opposite sides of the cutting plates with the plates in opposing relation to each other.

JOSEPH J. FINE.

REFERENCES. CITED The following references are ofrecord" in the file of this patent:

UNITED STATES PATENTS Number Name Date 31,674 Perkins Mar. 12, 1861 1-,090;297- Greenwell Mar. 17, 1914 2,232,361 Bartlett Feb. 18, 1941 FOREIGN PATENTS Number Country Date 18,164 Great Britain V Sept. 8, 1905 

